vlda

Front

What is a carbon to carbon double bond?

Back

A carbon to carbon double bond is a type of covalent bond where two carbon atoms share two pairs of electrons, resulting in a stronger bond than a single bond. An example is found in 2-Butylene.

Front

Why is fused alumina reduced to aluminium by electrolytic reduction?

Back

Fused alumina is reduced to aluminium by electrolytic reduction because alumina is highly stable, requiring a significant amount of energy to break its bonds.

Front

What type of image is formed when a pencil is placed at a distance of 30cm from a convex lens with a focal length of 15cm?

Back

A real and inverted image is formed at 10 cm from the lens.

Front

What atomic number should an element have to form an acidic oxide?

Back

An element should have an atomic number of 7 to form an acidic oxide.

Front

What is known as 'Oil of vitriol'?

Back

Sulfuric acid is commonly referred to as 'Oil of vitriol'.

Front

Define a covalent bond.

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the significance of the focal length in lenses?

Back

The focal length of a lens determines how strongly it converges or diverges light, affecting the size and type of image formed.

Front

What is an acidic oxide?

Back

An acidic oxide is an oxide that reacts with water to form an acid or reacts with a base to form a salt.

Front

Explain the process of electrolytic reduction.

Back

Electrolytic reduction is a process where an electric current is used to drive a non-spontaneous chemical reaction, often used to extract metals from their ores.

Front

What is the difference between real and virtual images?

Back

Real images can be projected on a screen and are formed when light rays converge, while virtual images cannot be projected and are formed when light rays diverge.